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1 year ago

Simplify, (xy+yz)² - 2x²y²z² and find the value when x=-1, y=2 and z=1

Mathematics

2 answers:

inna [77]1 year ago

5 0

Answer:

a)x²y²+2xy²z+y²z²-2x²y²z²

b) -8

Step-by-step explanation:

foil the squared to get:x²y²+2xy²z+y²z²

and then plug in the numbers and chug along

hope this helps

nydimaria [60]1 year ago

4 0

<h3>Simplify:</h3>

We have

(xy + yz)² - 2x²y²z

If,

x = -1, y = 2 and z = 1

Putting value:

(xy + yz)² - 2x²y²z

➡ (-1×2 + 2×1)² - 2×-1²×2²×1

➡ (-2 + 2)² - 2×1×4×1

➡ (0)² - 8

➡ 0 - 8 = -8,answer

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